Control-to-Data Beam Mapping for Faster mmWave Beam Tracking

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Solution Overview

Problem

The high path loss and short range of millimeter wave (mmW) radio frequency communications in LTE systems necessitate beamforming, which results in a large number of potential beams that need to be scanned, leading to significant beam overhead and prolonged scanning times.

Innovation Solution

A method to correlate or independently select beams for control and data channels based on explicit or implicit mapping, reducing the number of beams that need to be scanned by establishing a relationship between control and data channel beams.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If beamforming is used to compensate for high path loss and short range in mmW communications, then communication reliability is improved, but the number of beams to be scanned increases significantly

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidnumber of beams

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent applies preliminary action by performing beam correspondence determination before actual beam scanning. The UE determines whether its transmit beam corresponds to its receive beam in advance, which allows the network to reduce the number of beams that need to be scanned during beamforming procedures, thus resolving the contradiction between maintaining communication reliability and reducing the quantity of beams

Inventive Principle:

Principle #10Preliminary action

2Area of stationary object

If a large number of beams are scanned during beamforming procedure, then beam coverage is improved, but scanning time increases

Engineering Contradiction:

Improvebeam coverageVSAvoidscanning time

Core Design Contradiction:

Area of stationary objectVSLoss of time

Solution Approach 1:

The patent uses preliminary beam correspondence determination to identify which beams are likely to be successful before conducting the full beam scanning procedure. This allows the system to maintain comprehensive beam coverage while significantly reducing the actual scanning time by focusing only on the most promising beams

Inventive Principle:

Principle #10Preliminary action

3Area of stationary object

If a large number of beams are scanned during beamforming procedure, then beam coverage is improved, but beam overhead increases

Engineering Contradiction:

Improvebeam coverageVSAvoidbeam overhead

Core Design Contradiction:

Area of stationary objectVSQuantity of substance

Solution Approach 1:

The patent applies preliminary beam correspondence determination to identify a reduced set of candidate beams before the actual beamforming procedure. This allows the system to maintain comprehensive beam coverage while reducing beam overhead by eliminating the need to scan and manage a large number of beams

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250365045A1Mapping between a control beam and a data channel beam

Publication Date: 2025.11.27 QUALCOMM INC

AI summary

There is a need for a beam tracking technique that reduces the time needed to perform a beamforming procedure and that reduces beam overhead. The apparatus may determine a mapping between a first beam associated with a first type of channel and a second beam associated with a second type of channel. In an aspect, the first type of channel may be different than the second type of channel. The apparatus may receive the first beam associated with the first type of channel and the second beam associated with the second type of channel. In an aspect, the first beam and the second beam may be received from a second device.